#include <iostream>
#include <fstream>
using namespace std;
long int a[10001],b[10001],i,j,k,mx=0,n,p;
int main()
{
    ifstream fin("scmax.in");
    ofstream fout("scmax.out");
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>a[i];
    for(i=n;i>=1;i--)
    {
        for(j=i+1;j<=n;j++)
        {
            if((a[j]>a[i])&&(b[i]<=b[j]))
            b[i]=b[j]+1;
        }
        if(b[i]==0)
        b[i]=1;
    }
    for(i=1;i<=n;i++)
        if(b[i]>mx)
            mx=b[i];
    fout<<mx<<endl;
    for(i=1;i<=n;i++)
    {
        if(b[i]==mx)
        {
            fout<<a[i]<<" ";
            mx--;
        }
    }

    return 0;
}